Several large‐scale superperiodicities on highly oriented pyrolytic graphite observed by scanning tunneling microscopy
作者:
X. Yang,
Ch. Bromm,
U. Geyer,
G. von Minnigerode,
期刊:
Annalen der Physik
(WILEY Available online 1992)
卷期:
Volume 504,
issue 1
页码: 3-10
ISSN:0003-3804
年代: 1992
DOI:10.1002/andp.19925040103
出版商: WILEY‐VCH Verlag
关键词: Scanning tunneling microscopy;Graphite;Superstructure
数据来源: WILEY
摘要:
AbstractOn freshly cleaved highly oriented pyrolytic graphite we observed large‐scale superperiodicities by a scanning tunneling microscope at room temperature in air. Several hexagonal superstructures with periods of 30 nm, 4.2 nm, 2.4 nm, and 2.0 nm, respectively, and a strip‐like superstructure with a period of 1 nm were obtained. With exception of the largest hexagonal superperiodicity (30 nm spacing), all other superstructures are superimposed on the atomic corrugation of graphite. The origin of these superstructures is not clear yet. We assume that they arise from crystal defects in graphite. The hexagonal superstructure may be caused by the Moiré effect due to the rotational misorientation of the two top layers or of two successive layers near the sur
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